DEVICE FOR MEASURING DEFORMATIONS ON THE WALLS OF A MINE Russian patent published in 2021 - IPC E21C39/00 

FIELD: geomechanics.

SUBSTANCE: invention relates to geomechanics and is intended to measure the deformations of the walls of mine workings with the subsequent calculation of the acting stresses in the rock mass. The device contains removable benchmarks and a measuring device, and the benchmarks are made in the form of metal rods with a thread at one end to connect it to the anchor and having a protective removable cap, and at the second end of each removable benchmark there is a fixed outer cage of the rolling bearing. In the inner ring of the bearing rotating around the axis of the reference frame, a round rod is rigidly fixed and a ring is rigidly fixed to it, which is connected to the hook of the length meter in the form of a tape extensometer. The effect is achieved due to the invariability of the direct contacts of the reference nodes with deep layers of rock and a particularly reliable design of the nodes themselves.

EFFECT: use of the proposed device will make it possible to obtain more reliable measurements, in addition, the device is simple in design and reliable in operation, which ensures the stability of the fiducial point.

1 cl, 4 dwg